<template>
	<view>
		<!-- 使用自定义的搜索组件 -->
		<!-- <my-search :bgcolor=" 'pink' " :radius="3"></my-search> -->
		<my-search @click="gotoSearch"></my-search>
		<view class="scroll-view-container">
			<!-- 左侧的滑动区 -->
			<scroll-view class="left-scroll-view" scroll-y="true" :style="{height:wh + 'px'}">
				<block v-for="(item,i) in cateList" :key="i">
					<view :class="['left-scroll-view-item', i === active ? 'active' : '']" @click="activeChanged(i)">{{item.cat_name}}</view>
				</block>
				
			</scroll-view>
			<!-- 右侧的滑动区 -->
			<scroll-view scroll-y="true" :style="{height:wh + 'px'}" :scroll-top="scrollTop">
				<view class="cate-lv2" v-for="(item2, i2) in cateLevel2" :key="i2">
					<!-- 二级分类的标题 -->
				    <view class="cate-lv2-title">/ {{item2.cat_name}} /</view>
					<!-- 当前二级分类下的三级分类列表 -->
					<view class="cate-lv3-list">
						<!-- 三级分类的item项 -->
						<view class="cate-lv3-item" v-for="(item3, i3) in item2.children" :key="i3" @click="gotoGoodsList(item3)">
							<!-- 三级分类的图片 -->
							<image :src="item3.cat_icon"></image>
							<text>{{item3.cat_name}}</text>
						</view>
						
					</view>
				</view>
			</scroll-view>
		</view>
	</view>
</template>

<script>
	export default {
		data() {
			return {
				wh: 0 ,
				cateList:[],
				active:0,
				// 二级分类的列表
				cateLevel2:[],
				//滚动条距离顶部的距离（但是版本更新好像不需要处理这个bug）
				scrollTop: 0
			};
		},
		onLoad() {
			const sysInfo = uni.getSystemInfoSync()
			console.log(sysInfo)
			this.wh = sysInfo.windowHeight // -50
			
			this.getCateList()
			
		},
		methods:{
			//获取分类列表的数据
			 async getCateList(){
				const {data: res}  = await uni.$http.get('/api/public/v1/categories')
				if(res.meta.status !==200) return uni.$showMsg()
				this.cateList = res.message
				uni.$showMsg('数据请求成功!')
				
				//为二级分类赋值
				this.cateLevel2 = res.message[0].childen
				
			},
			
	
			activeChanged(i){
				this.active = i
				
				//重新为二级分类赋值
				this.cateLevel2 = this.cateList[i].children
				
				// this.scrollTop = this.scrollTop === 0 ? 1 : 0
			},
			//跳转到商品列表页面
			gotoGoodsList(item){
				uni.navigateTo({
					url:'/subpkg/goods_list/goods_list?cid=' + item.cat_id
				})
			},
			gotoSearch(){
				// console.log('ok')
				uni.navigateTo({
					url: '/subpkg/search/search'
				})
			}
		}
	}
</script>

<style lang="scss">
.scroll-view-container{
	display: flex;
}
.left-scroll-view{
	width: 120px;
}
.left-scroll-view-item{
	background-color: #f7f7f7;
	line-height: 60px;
	text-align: center;
	font-size: 12px;
	
	
	&.active{
		background-color: #FFFFFF;
		position: relative;
		
		&::before{
			content: ' ';
			display: block;
			width: 3px;
			height: 30px;
			background-color: #C00000;
			position: absolute;
			top: 50%;
			left: 0;
			transform: translateY(-50%);
		}
	}
	
	
}
.cate-lv2-title{
		font-size: 12px;
		font-weight: bold;
		text-align: center;
		padding: 15px;
	}
.cate-lv3-list{
	display: flex;
	flex-wrap: wrap;
	.cate-lv3-item{
		width: 33.33%;
		display: flex;
		flex-direction: column;
		justify-content: center;
		align-items: center;
		margin-bottom: 10px;
		
	image {
		width: 60px;
		height: 60px;
	}
	text {
		font-size: 12px;
	}
	}
}
</style>
